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Subject[PATCH cgroup/for-4.21 1/2] cpuset: Minor cgroup2 interface updates
From b1e3aeb11c5e86ee0988a038c4e7682d6beaa977 Mon Sep 17 00:00:00 2001
From: Tejun Heo <tj@kernel.org>
Date: Tue, 13 Nov 2018 12:03:33 -0800

* Rename the partition file from "cpuset.sched.partition" to
"cpuset.cpus.partition".

* When writing to the partition file, drop "0" and "1" and only accept
"member" and "root".

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Waiman Long <longman@redhat.com>
---
Two minor cpuset interface followup patches. Applying to
cgroup/for-4.21.

Thanks.

Documentation/admin-guide/cgroup-v2.rst | 6 +++---
kernel/cgroup/cpuset.c | 8 ++++----
2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/Documentation/admin-guide/cgroup-v2.rst b/Documentation/admin-guide/cgroup-v2.rst
index f83a5231bbe3..07e06136a550 100644
--- a/Documentation/admin-guide/cgroup-v2.rst
+++ b/Documentation/admin-guide/cgroup-v2.rst
@@ -1708,15 +1708,15 @@ Cpuset Interface Files

Its value will be affected by memory nodes hotplug events.

- cpuset.sched.partition
+ cpuset.cpus.partition
A read-write single value file which exists on non-root
cpuset-enabled cgroups. This flag is owned by the parent cgroup
and is not delegatable.

It accepts only the following input values when written to.

- "root" or "1" - a paritition root
- "member" or "0" - a non-root member of a partition
+ "root" - a paritition root
+ "member" - a non-root member of a partition

When set to be a partition root, the current cgroup is the
root of a new partition or scheduling domain that comprises
diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c
index b897314bab53..1151e93d71b6 100644
--- a/kernel/cgroup/cpuset.c
+++ b/kernel/cgroup/cpuset.c
@@ -2468,11 +2468,11 @@ static ssize_t sched_partition_write(struct kernfs_open_file *of, char *buf,
buf = strstrip(buf);

/*
- * Convert "root"/"1" to 1, and convert "member"/"0" to 0.
+ * Convert "root" to ENABLED, and convert "member" to DISABLED.
*/
- if (!strcmp(buf, "root") || !strcmp(buf, "1"))
+ if (!strcmp(buf, "root"))
val = PRS_ENABLED;
- else if (!strcmp(buf, "member") || !strcmp(buf, "0"))
+ else if (!strcmp(buf, "member"))
val = PRS_DISABLED;
else
return -EINVAL;
@@ -2631,7 +2631,7 @@ static struct cftype dfl_files[] = {
},

{
- .name = "sched.partition",
+ .name = "cpus.partition",
.seq_show = sched_partition_show,
.write = sched_partition_write,
.private = FILE_PARTITION_ROOT,
--
2.17.1
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